After receiving the needed angle from Sonex, I fabricated the mounting brackets in my home shop and took them to the hangar to start the install. I needed to drill out 4 existing rivets on the Port lower Longeron, and 2 were easy, the other two took a 40 minute ride on the Struggle Bus. And I had to modify the brackets to clear the dust boot on the master. The dimensions on the drawings for the holes in the brackets that the AN5 bolts pass through are wrong, as are the holes that attach the outboard bracket to the Longeron.